<form action="{% url 'polls:vote' question.id %}" method="post">
    {% csrf_token %}
    <fieldset>
        <legend>
            <h1>{{ question.question_text }}</h1>
        </legend>
        {% if error_message %}
        <p><strong>{{ error_message }}</strong></p>
        {% endif %}
        {% for choice in question.choice_set.all %}
        <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}">
        <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label>
        <br>
        {% endfor %}
    </fieldset>
    <input type="submit" value="Vote">
</form>